Remove OneToOne user, add unique_together user and opportunity on Opp…

…ortunity Access

commcare_connect/opportunity/migrations/0016_alter_opportunityaccess_user_and_more.py

@@ -0,0 +1,24 @@
+# Generated by Django 4.2.3 on 2023-09-12 05:21
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ("opportunity", "0015_remove_opportunityaccess_date_claimed"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="opportunityaccess",
+            name="user",
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AlterUniqueTogether(
+            name="opportunityaccess",
+            unique_together={("user", "opportunity")},
+        ),
+    ]

commcare_connect/opportunity/models.py

@@ -134,7 +134,7 @@ class Assessment(XFormBaseModel):
 
 
 class OpportunityAccess(models.Model):
-    user = models.OneToOneField(User, on_delete=models.CASCADE)
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
     opportunity = models.ForeignKey(Opportunity, on_delete=models.CASCADE)
     date_learn_started = models.DateTimeField(null=True)
 
@@ -166,6 +166,9 @@ def last_visit_date(self):
 
         return
 
+    class Meta:
+        unique_together = ("user", "opportunity")
+
 
 class VisitValidationStatus(models.TextChoices):
     pending = "pending", gettext("Pending")